<VV> RE: VirtualVairs digest, Vol 1 #790 - 11 msgs

[srmarti]

Good thing to point out.  You can't readily convert offset to backspace
either, unless you know both the rim width and edge thickness.

My understanding of offset from Fred Puhn's "How to make your car handle"
tells me the stock vair has 1" negative offset (more of the rim is inboard
than outboard).  Does everyone concur with that description?

Provided there is no clearance issue, maintaining the stock offset will have
the least effect on wheel bearing load and steering characteristics.
Correct?

I guess for right now we don't know for certain what we have here if someone
wanted to duplicate Dave's setup.

And now for the $64K question. What tire/wheel size fits with the 1"
negative offset on the EM and LM?

Steve Marti

> Message: 6
> Date: Wed, 21 Jul 2004 16:24:39 -0400
> Subject: Re: <VV> RE: perfect fit 16x7
> Cc: "'virtualvairs@corvair.org'" <virtualvairs@corvair.org>
> To: "Petersen, Dave" <dave_petersen@eli.net>
> From: Bryan Blackwell <bryan@skiblack.com>
>
> A clarification - "backspacing" is not "offset".  Backspacing is the
> distance from the inside edge of the rim to the hub mounting surface.
> Offset is the distance from the rim centerline to the mounting surface.
>   I have a graphic on my site that shows both:
>
> http://autoxer.skiblack.com/tires.html
>
> The one thing to be careful of when using offset is that there isn't a
> real standard of what positive and negative mean.  The stock wheels are
> offset in towards the center of the car 1" (or 25.4mm), which I've seen
> referred to as both positive and negative.
>
> What's interesting is that many newer cars have the wheels tucked
> further in than back in the 60's and 70's, when most wheels were offset
> to the outside of the car.  This is good for Corvairs, since our wheels
> are meant to be inboard of the mounting surface.
>
> On Wednesday, July 21, 2004, at 11:30 AM, Petersen, Dave wrote:
>
> > The backspacing is 18mm positive offset.   I believe the stock corvair
> > wheel
> > has 25mm positive.
> > Dave
> >
> >>> So what's the backspacing on this perfect fitting wheel/tire setup?
> >>> Steve Marti
> >>>
> --
> Bryan Blackwell bryan@skiblack.com
> http://autoxer.skiblack.com/
>    Corvairs: '61 Lakewood, '64 Greenbrier, '65 Corsa, '66 Corsa
>    '69 Road Runner, '97 Ford F-150, '99 Neon R/T
> "Why do something if you're not going to obsess about it?"
>
> --__--__--